Necklace of Adaptation
This necklace is a heavy chain with a platinum medallion. The magic of the necklace wraps the wearer in a shell of fresh air, making him immune to all harmful vapors and gases (such as cloudkill and stinking cloud effects, as well as inhaled poisons) and allowing him to breathe, even underwater or in a vacuum.
The wearer is surrounded by a close shell of rapidly circulating air. This has the side effect of blurring the wearer’s vision slightly, similar to the distortion caused by hot air rising off pavement. The wearer takes a -1 penalty to attack rolls, reflex saving throws, and skill checks involving vision.